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Food Poisoning: Understanding How Bacteria Come Back from the 'Dead'

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Salmonella remains a serious cause of food poisoning in the UK and throughout the EU, in part due to its ability to thrive and quickly adapt to the different environments in which it can grow. New research involving a team of IFR scientists, funded by BBSRC, has taken the first detailed look at what Salmonella does when it enters a new environment, which could provide clues to finding new ways of reducing transmission through the food chain and preventing human illness.

Bacteria can multiply rapidly, potentially doubling every 20 minutes in ideal conditions. However, this exponential growth phase is preceded by a period known as lag phase, where no increase in cell number is seen. Lag phase was first described in the 19th Century, and was assumed to be needed by bacteria to prepare to exploit new environmental conditions. Beyond this, surprisingly little was known about lag phase, other than bacteria are metabolically active in this period. But exactly what are bacteria doing physiologically during this period?

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